To provide an autolock automatic door capable of discriminating illegal action operating a sensor by an insert from the outside from an outgoing of general dwellers, and not opening a door in the case the sensor is operated from the outside.

A first sensor 8 detecting the relatively narrow range of a door side centering the gap of the opening and closing part of a door front and a second sensor 9 detecting the relatively wider range of a building side than the detection range of the first sensor 8 are provided, and entering cannot be performed by illegal action operating the sensors 8, 9 by an insert from the outside by automatically opening the door only in the case where the sensors 8, 9 detect and operates in the order of the second sensor 9 and the first sensor 8.